Minimum Buses Required

Given several datasets, each representing a class of students, determine the minimum number of buses required so that every student can be seated. Each test case provides two parameters: n (the number of students) and c (the seating capacity of one bus). Although each test case also provides a list of student grades, these grades are not used in the calculation.

The formula to calculate the required number of buses is given by \(\lceil n/c \rceil = \frac{n+c-1}{c}\). The input terminates when a test case with 0 0 is encountered.

inputFormat

The input consists of several test cases. Each test case is described using two lines:

1. The first line contains two integers n and c, where n is the number of students and c is the capacity of a bus.
2. The second line contains n integers denoting the students' grades. These values are provided for each test case but are not used in calculating the answer.

The input terminates when a line with 0 0 is read.

outputFormat

For each test case, output a single line containing the minimum number of buses required.

## sample

7 3
1 1 2 2 3 3 4
4 5
1 2 3 4
6 2
1 1 1 1 1 1
0 0

3
1
3

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